我正在开发一个 Android 音乐播放器应用程序。我想将它与 Google Assistant 集成以通过语音控制播放和搜索歌曲。我已经根据官方文档中的说明在我的应用程序中实现了媒体会话。
当请求助手使用我的应用播放某些内容时，我必须说“在MyApp上播放一些艺术家”之类的话。当我说“播放某位艺术家”时，助理告诉我我没有配置默认音乐提供商。
这将引导我进入 Google Assistant 应用程序中的以下屏幕：
我注意到MyApp未列在“您的音乐服务”中。我的问题如下：我必须在我的应用程序中进行哪些更改才能将其选为默认音乐服务？
供您参考，这里是清单文件：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="fr.nihilus.music">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-feature
android:name="android.hardware.audio.output"
android:required="true" />
<application
android:name=".NihilusMusicApplication"
android:allowBackup="true"
android:fullBackupContent="@xml/backup"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:ignore="GoogleAppIndexingWarning">
<!-- Main activity for music browsing. -->
<activity
android:name=".HomeActivity"
android:launchMode="singleTop"
android:theme="@style/AppTheme.NoActionBar">
<!-- Make this Activity visible in launcher -->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<!-- Make this activity available as the default music app. -->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.APP_MUSIC" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<!-- Intent filter that enables voice searches, such as "Play the Beatles" -->
<intent-filter>
<action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<meta-data
android:name="android.app.default_searchable"
android:value=".ui.SearchResultActivity" />
<meta-data
android:name="android.app.shortcuts"
android:resource="@xml/shortcuts" />
</activity>
<!-- Activity showing detail and tracks of an album. -->
<activity
android:name=".ui.albums.AlbumDetailActivity"
android:parentActivityName=".HomeActivity"
android:theme="@style/AppTheme.NoActionBar" />
<!-- Activity for toggling user preferences. -->
<activity
android:name=".settings.SettingsActivity"
android:label="@string/action_settings"
android:parentActivityName=".HomeActivity" />
<!--
Activity to be opened as a dialog window when a track is selected
from the file explorer.
-->
<activity android:name=".FileViewerActivity"
android:theme="@style/AppTheme.FileViewer"
android:excludeFromRecents="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data
android:mimeType="audio/*"
android:scheme="content" />
</intent-filter>
</activity>
<!--
Main music service, provides media browsing and media playback services to
consumers through MediaBrowserService and MediaSession. Consumers connect to it through
MediaBrowser (for browsing) and MediaController (for play session control)
-->
<service
android:name=".service.MusicService"
android:exported="true"
android:label="@string/playback_service_label"
android:process=":musicplayer"
tools:ignore="ExportedService">
<intent-filter>
<action android:name="android.media.browse.MediaBrowserService" />
</intent-filter>
</service>
<!--
A receiver that will receive media buttons and send as intents to MusicService.
Required on pre-Lollipop.
-->
<receiver android:name="android.support.v4.media.session.MediaButtonReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</receiver>
</application>
</manifest>